Remote Senior Mechanical Design Engineer – Liquid Cooling

Armada; California; Remote; USD 140,000 - 230,000; Full time

Benefits offered by this job

Medical, dental and vision

401(k) retirement plan

Equity

14 paid company holidays per year

Job summary

Armada is seeking a Senior Mechanical Systems / Design Engineer to lead the design and development of liquid cooling and mechanical distribution systems for our modular AI data center platforms. This role sits at the intersection of mechanical design, hydraulic engineering, thermal infrastructure, manufacturing, controls, and commissioning.

You will own the mechanical distribution architecture connecting heat-rejection equipment, pumps, piping, manifolds, coolant distribution units, rack cooling

Qualifications

• 7+ years of experience designing mechanical cooling, hydraulic distribution, process cooling, or mission-critical infrastructure systems.
• Experience with data centers, semiconductor facilities, industrial process cooling, central utility plants, or comparable high-reliability environments.
• Strong knowledge of pipe sizing, pump selection, pressure-drop analysis, flow balancing, system volume, and hydraulic control.
• Experience developing and owning P&IDs, mechanical calculations, equipment schedules, valve schedules, and instrumentation requirements.
• Practical knowledge of chilled-water, condenser-water, glycol, or process-fluid systems.
• Experience designing for commissioning, maintenance, isolation, flushing, venting, draining, and service access.
• Ability to coordinate across engineering, manufacturing, controls, commissioning, and field teams.

Responsibilities

• Own the end-to-end mechanical cooling and fluid-distribution architecture for modular data center platforms.
• Align heat-rejection equipment, distribution piping, CDUs, rack manifolds, rear-door heat exchangers, and other cooling interfaces.
• Develop scalable architectures that support multiple product configurations and deployment sizes.
• Develop hydraulic models for water and glycol-based systems.
• Account for fluid concentration, viscosity, temperature, fittings, valves, strainers, heat exchangers, and equipment pressure losses.
• Define control-valve, balancing-valve, bypass, minimum-flow, and differential-pressure strategies.
• Validate system performance across normal, part-load, maintenance, startup, and failure conditions.
• Own P&IDs, mechanical schematics, equipment schedules, valve schedules, instrumentation schedules, and design calculations.
• Develop mechanical design criteria, basis-of-design requirements, and standard details.
• Define clear equipment and scope boundaries between plant systems, modules, CDUs, rack cooling, and field interconnections.
• Maintain disciplined revision control and technical traceability across the mechanical design package.
• Review vendor drawings, submittals, calculations, and equipment selections for compliance with system intent.
• Define mechanical interfaces between factory-built modules and field-installed infrastructure.
• Develop repeatable interconnect strategies for supply and return piping, manifolds, flexible connections, isolation valves, quick disconnects, drains, vents, and leak detection.
• Establish labeling, connection, access, and installation standards that reduce field variability.
• Support product configurations designed for transport, rapid installation, and phased expansion.
• Design systems for safe and efficient filling, flushing, venting, draining, testing, balancing, and startup.
• Define isolation, bypass, temporary connection, and load-bank testing requirements.
• Develop or support factory acceptance, site acceptance, and integrated systems testing procedures.
• Establish performance-verification criteria for flow, pressure, temperature, heat rejection, controls, alarms, and failure modes.
• Work directly with commissioning and field teams during startup and troubleshooting.
• Partner with thermal, electrical, controls, structural, manufacturing, commissioning, supply chain, and product teams.
• Coordinate equipment clearances, removal paths, service access, drain points, vent points, and filter or strainer access.
• Translate field and factory feedback into product improvements.
• Define the mechanical measurement and control requirements for temperature, flow, differential pressure, pressure, leak detection, fluid level, pump status, and valve position.
• Partner with controls engineers to develop system operating sequences and alarm strategies.
• Support pump staging, variable-speed control, minimum-flow protection, equipment enablement, and failure-response logic.

Skills

Mechanical design

Hydraulic distribution

Thermal infrastructure

P&IDs

Pipes sizing

Pump selection

Flow balancing

Cross-functional coordination

CFD/thermal modeling

AutoCAD

Revit

Plant 3D

SolidWorks

Inventor

Tools

AutoCAD

Revit

Plant 3D

SolidWorks

Inventor

Job description

Armada is seeking a Senior Mechanical Systems / Design Engineer to lead the design and development of liquid cooling and mechanical distribution systems for our modular AI data center platforms. This role sits at the intersection of mechanical design, hydraulic engineering, thermal infrastructure, manufacturing, controls, and commissioning.

You will own the mechanical distribution architecture connecting heat-rejection equipment, pumps, piping, manifolds, coolant distribution units, rack cooling